Tony,

there are several around - probably the easiest for you will be the one near Amets Cider bar (Amets is now signposted all over the place so easy to find).  They are in (I think) the second street up from the Husqvarna shop - there is a sign 'Tinatoria' (I think that's the correct spelling!) outside - it's in one of the streets where the Monday Market is held.

From the police station head towards the Millenium bridge.  Go straight across both roundabouts (Amets on your left) then it's near the end of the street with the trees in the middle.

Nigel